Alert archive / Arkansas / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 340, NWS Little Rock, AR

October 2, 2014Johnson County, Logan County, Newton County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Oct 2, 2014, 5:37 PM CDT for Johnson County, Logan County, Newton County, Arkansas. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 2, 2014, 5:37 PM CDT (22:37 UTC)
Expired: Oct 2, 2014, 6:00 PM CDT
In force: 23 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Johnson County, AR, Logan County, AR, Newton County, AR

The radar

The Western Arkansas radar (KSRX), 87 km from the middle of the area, began a volume at 22:39 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 2, 12:20 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.6 hours before the alert went out and 151 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2054 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 689 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 285 m²/s²
0-3 km storm-relative helicity: 281 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 11.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 2, 2:37 PM CDT, 3 hours earlier.

Area forecast discussion, Oct 2, 2:37 PM CDT, 3 hours before

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Hazardous weather outlook, Oct 2, 3:45 PM CDT, 1 hour 52 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
345 PM CDT THU OCT 2 2014

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-031000-
ARKANSAS-BAXTER-BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND-
CONWAY-DALLAS-DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING-
INDEPENDENCE-IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-LONOKE-
MARION-MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-POPE-
PRAIRIE-PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-WHITE-
WOODRUFF-YELL-
345 PM CDT THU OCT 2 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A LARGE PART OF ARKANSAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A POTENT COLD FRONT WILL MOVE ACROSS ARKANSAS TONIGHT. WIDESPREAD
SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND OUT AHEAD OF THE
BOUNDARY. STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE...WITH THE
THUNDERSTORMS EXPECTED TO GRADUALLY FORM INTO A SQUALL LINE.

ANY SEVERE STORMS THAT DEVELOP THROUGH TONIGHT WILL BE CAPABLE OF
PRODUCING DAMAGING WIND GUSTS IN EXCESS OF 60 MPH...AND HAIL OF ONE
INCH IN DIAMETER OR GREATER. AT THIS TIME...THE TORNADO THREAT
APPEARS TO BE MINIMAL.

RAINFALL AMOUNTS WILL AVERAGE AROUND HALF AN INCH TO AN INCH AND A
HALF. HOWEVER...SOME LOCATIONS ACROSS THE NORTH COULD QUICKLY PICK
UP TWO INCHES BEFORE THE STORMS MOVE OUT OF THE REGION LATE TONIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A FEW STORMS MAY STILL BE IN EASTERN PARTS OF THE STATE VERY EARLY
FRIDAY MORNING...BUT THEY SHOULD MOVE EAST OF THE AREA BY MID
MORNING. MUCH DRIER AND COOLER AIR WILL FILTER INTO THE STATE
FROM THE NORTHWEST IN THE WAKE OF THE COLD FRONT. STRONG NORTHWEST
WINDS WILL BE SEEN ON FRIDAY. SOME OF THE COOLEST TEMPERATURES OF
THE SEASON MAY BE SEEN FRIDAY NIGHT INTO SATURDAY MORNING...
PARTICULARLY ACROSS NORTHERN ARKANSAS...WHERE LOW TEMPERATURES IN
THE UPPER 30S ARE IN THE FORECAST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON AND TONIGHT.

&&

VISIT NWS LITTLE ROCK ON THE WEB. GO TO HTTP://WEATHER.GOV AND
CLICK ON CENTRAL ARKANSAS.

226/57

In the hours before

Special weather statement, Oct 2, 2:00 PM CDT, 3 hours 37 minutes before

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Special weather statement, Oct 2, 2:14 PM CDT, 3 hours 23 minutes before

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Special weather statement, Oct 2, 2:29 PM CDT, 3 hours 8 minutes before

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Special weather statement, Oct 2, 3:12 PM CDT, 2 hours 25 minutes before

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Special weather statement, Oct 2, 3:26 PM CDT, 2 hours 11 minutes before

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Special weather statement, Oct 2, 4:22 PM CDT, 1 hour 15 minutes before

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The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 2, 1:34 PM CDT	Special Weather Statement	LZK	Bradley	26 min
Oct 2, 1:35 PM CDT	Special Weather Statement	LZK	Boone	15 min
Oct 2, 2:00 PM CDT	Special Weather Statement	LZK	Drew	30 min
Oct 2, 2:14 PM CDT	Special Weather Statement	LZK	Desha	26 min
Oct 2, 2:29 PM CDT	Special Weather Statement	LZK	Cleveland	21 min
Oct 2, 3:12 PM CDT	Special Weather Statement	LZK	Newton	28 min
Oct 2, 3:26 PM CDT	Special Weather Statement	LZK	Monroe	29 min
Oct 2, 4:22 PM CDT	Special Weather Statement	LZK	Woodruff	28 min
Oct 2, 4:58 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Pike	32 min
Oct 2, 5:13 PM CDT	Severe Thunderstorm Warning	LZK	Logan, Scott, Yell	47 min
Oct 2, 5:19 PM CDT	Severe Thunderstorm Warning	LZK	Polk, Scott	41 min
Oct 2, 5:29 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Garland, Hot Spring, Montgomery, Pike	33 min
Oct 2, 5:56 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Logan, Newton, Pope	49 min
Oct 2, 5:59 PM CDT	Severe Thunderstorm Warning	LZK	Logan, Montgomery, Pike, Polk, Scott, Yell	46 min
Oct 2, 6:16 PM CDT	Severe Thunderstorm Warning	LZK	Newton	29 min
Oct 2, 6:24 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Conway, Johnson, Marion, Newton, Pope and 2 more	66 min
Oct 2, 6:30 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Garland, Logan, Montgomery, Perry, Pope and 4 more	60 min
Oct 2, 6:34 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Garland, Hot Spring, Montgomery, Pike	56 min
Oct 2, 6:49 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Marion	26 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2014 Every severe thunderstorm warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.